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Posts posted by Grinde

  1. Hi guys...


    Words aren't enough to describe the sorrow for having to bring you these sad news, but our good friend Per Frejvall (perfrej on SGL) passed away last Friday in his home, for reasons unknown at the moment. He was in great spirit that day, but somehow went very sick, very quickly... He made the emergency-call himself saying he wasn't feeling well. Paramedics arrived promptly and resuscitation-attempts were made, but sadly it was already too late.

    Per was in great shape & spirit, he had enough plans & energy that I thought would last many lifetimes, he was a true life-lover who simply refused to see or accept obstacles were it personal, mechanical, optical or astro-software. He always came up with great solutions & really enjoyed doing so!


    I'm proud to call Per a true friend on all levels, he was a colorful original in a world of pale copies, full of life & humor, and I know his expertise and dedication to the astro-community will be greatly missed here. He had so many projects left, so many things to build, so many targets to shoot, so many champagnes to taste, so many persons lives to enlighten. He was needed by so many, but I quote his loving wife: "maybe he was needed elsewhere" . And wherever he is now, and if there's a problem there, I know he will fix it, having a good time while doing so, spreading joy & inspiration to everyone around him.


    My thoughts and condolences goes to his wife and children, I truly hope they can find hope & comfort among friends and family in this tragic event.


    If you want to send him and his family your best wishes & farewells, please write a line together with your name and I'll personally deliver it to him and his family in time for the funeral, together with a huge floral setting. I'm sure they will all be warmed by how many he affected worldwide through his love and dedication to this hobby/madness we call amateur astronomy. 


    And to Per, tonight I'll raise my champagne-glass to the star-filled skies and salute you, I know your view up there is fantastic , among your stars and galaxies. Take care my friend, I will miss you // Jonas Grinde

    I hope many of you will join me in the toast. Here's to Per !


    Per Frejvall 1958-2016

    • Like 21
  2. I'm having one of these, and I must say, it's the first astro-gadget I own that simply works flawlessly right from the start. You don't even have to select the com-port, the software automatically detects if the stick is present within seconds(in my case, less than a second). Ridiculously simple to use, accurate high-res data and graphs, modern "post-Win95 design" software with stylish and functional user interface.

    The file-outputs should work perfectly with automation-software such as CCD Autopilot, ACP and Sequence Generator Pro, but I also imagine this would be a really handy tool for "non-automated" people who's serious about their imaging. I find it really useful to be able to see how the conditions have changed during a night of imaing (while I'm asleep of course), especially the humidity and temperature which you can compare with eventual dewed subframes, to learn when it's time to crank up the dewheaters/fans.

    And as a 10 Micron owner, the StickStation gives me the ability to automatically and continuously update the in-mount handling for atmospheric refraction between every single sub, sending the mount all the fresh weather-data it needs to keep the pointing & unguided tracking spot on.

    Highly recommended!

  3. There are times when new images pop up that changes the way we look at things... The hubble deep field, for instance, made us realise how much "stuff" there really is even in the emptiest parts of the sky. And this mosaic of Orion will forever change the way I look upon Orion on the sky, it's simply the best widefield I've ever seen, period.

    I love the way the whole image looks so "uniform", how the big structures kept the same level of quality across many panels, there simply aren't any visible telltale signs of this being a 30 panel mosaic (except for the ridiculous number of pixels). How's this even possible? Top job guys, we're very grateful you made all this possible, thanks for sharing!

    Sign me up if you start selling big prints of this


    • Like 1
  4. The Robots, as I call them (the group running robotic scopes from my place) have just installed one of these. It has rather curtailed my style. I used to like going up onto the house roof at night, declaring independence, announcing my new set of postage stamps, making indiscrete references to Joan of Arc and hurling abuse at passing enemy aircraft. (Surprising how many there are.) I now have to do this from within the observatory to avoid detection...

    :grin: lly

    Don't fight fight us Olly, resistance is futile! // The Les Granges Robots

    (attaching a photo of our robotic setup, we're blending right in at Olly's backyard.)


    Sincerely sorry for cramping your style, but the Allsky-camera has a mask-feature, so we can look into masking out your roof-top.

    Gina, that's an awesome project you got going!

    When the camera is up and running, I'd recommend having a look at the allsky-software from Moonglowtech, http://www.moonglowtech.com/products/AllSkyCam/Software.shtml (the brand we're using at Olly's), the program is really packed with nice features as ftp-upload, periodic movie-generation and so on... I'm sure you'll write your own software for it, but the trial-version may be worth a peek for inspiration. 

    Keep it up & merry xmas


    • Like 3
  5. So Olly will need a new dedicated internet connection for the mass of image data being moved!!

    The image really shows what is possible..

    There will be futuristic stuff regulating the observatory-bandwidth so we won't strangle the data-pipeline too much! And since the rigs are fully automated, no user-inputs will be required during imaging, just submitting the imaging-requests which can be done anytime through any web-browser device such as smartphones, tablets & so on.

    I'm very curious what can be done from Les Granges top-quality skies, since this image was shot under quite crappy conditions compared to Olly's! :)

  6. Brilliant image. But... where do you go from here? Your very own DSS perhaps   :)


    Great work Jonas.  An incredible amount of effort and dedication must have gone into this, and you've created a truly remarkable outcome, so congratulations and thanks for sharing!    :icon_salut:

    Dare I ask...what's your next project going to be?!    :grin:

    Is it too soon to ask what your next target will be?

    Thanks for sharing such beautiful images, Jonas.

    That's a great question, where do I go from here? To Procence, actually.  :D

    My rig will be transported down to the new remote observatory this summer where it will share roof with 3 remote rigs. My horrible Swedish seeing is holding me back too much since I want to fully unleash my rigs potential under perfect skies. Everyone who've visited Olly Penrice's location knows what I'm talking about, there's no coincidence so much astronomy goes on in that region.

    So with significantly darker skies and probably 4 times as many clear nights as my part of Sweden, I will probably start doing real big & crazy(stupid) projects since I have a hard time saying no to challanges. & I belive Mr.Penrice once dared me to make a full mosaic of the entire cygnus-loop at this resolution, so yeah, I'm just getting started    :evil:

    Great image, well done

    What I find fascinating are the red nebula, eg C275, just imagine what it would look like if we were resident locally in Andromeda!

    Funny, I know exactly which cluster you meant by reading your post!   :grin: I remember myself thinking exactly the same thing! Just imagine the view from those locations, especially from C275! One can dream...

    • Like 1
  7. I want to extend my most humble and sincere thanks to all of you who enjoyed and commented my image!!! It's been a long journey and I'm very happy to be able to share this epic "space-voyage to andromeda and back" with all of you. Seeing so many ppl being inspired and encouraged in exploring this fantastic galaxy really makes my day! It definatelly makes up for all my hard work, and it's already making me look forward to my next project, what ever that may be!
    A lot of ppl might think I'm crazy, spending all this time and and money on astrophotography... But I'm really making my childhood dream come true, exploring nebulas, galaxies and beyond. My telescope is my spaceship and the ccd is my window. I'm living my dream. Those who don't, they are the ones who's crazy ;)
    So to all of you... Thanks! :)

    I forgot that the AG is at f/3.8...that explains a lot lol. Most people would do long exposures combined with short ones to control the core and just do layer masking in the processing to feather the core out. Is the main reason you didn't use this more common technique because of your clouds and seeing, which I completely understand why it would limit you, or is there another reason why?

    At f/3.8 and under my skies, 3 minutes was enough to make the background in my subs sky-limited. Increasing sub-lengths beyond that won't bring out fainter background-galaxies (since the sky is "outshining" the weaker ones). In fact, longer exposures would reduce the dynamic range in this photo, bloating more stars and blowing out the core of M 31, so I see no point of going for even longer exposures on this target since its entire dynamic range fits within my cameras dynamic range. The only target I've shot so far that motivates the hassle of multi-length exposures is M42. But for all other than M42, I stick with a single sub-length for all my filters.

    Note that these are all my personal opinions based on my own experiences, not to be taken too seriously ;)

    Epic piece of work! You surely have your astrograph working to the fullest potential!

    Just out of curiosity: Can you see any variance in the brightness of Hubble's V1 Cepheid, since the image was stretched over several months?

    Again, great work.


    Great idea!!

    But unfortunately I belive the subs for that particular mosaic-panel was shot during a short period of a few days in the same week, but I'll definately have a look! Perhaps compare it with the earlier M31's I shot with my 190MN.

    Great work Jonas, and it was a real pleasure listening to your lecture about this earlier this year.

    Thank you!

    And once again the pleasure was all mine, thanks for giving me the opportunity of coming down & meeting you all, what a fantastic astro-community you have!

    Images like yours just go to show what can be achieved by backyard astronomers. Fantastic image.

    Hearing other people being inspired by my work is making it all the hard work worth it. Every single night of cursing the moon, clouds, photoshop & other infernal forces us astrophotographers have to fight all to often :D Thanks!

     Absolutely amazing piece of work and image    Congratulations!  :icon_salut:   Truly "out of this world" in both senses  :)

    Thanks Gina! "Out of this world" was my state of mind while processing this... Over and over again I found my self not processing, but exploring :)

    that is a seriously insane image!!! got it as my desktop wallpaper (i hope you dont mind)


    I'm seeing about having this printed as a poster!!!

    I don't mind my work being used as wallpaper or toiletpaper as long as it's for personal use :)

    But just a quick reminder to all of you thinking of printing it: at home with your own printer is OK, but taking it to a printing-lab without my permission to do so would be a copyright-infringement and against the law & so on.

    (And don't think of sending it to a magazine under another name, because I will find you ;) Just like I found someone else posting my Rosette Nebula last year (ended up in S@N magazine). We settled things like gentlemen with no need for Judge Judy to step in... But if it happens again, I will come after you.  :police:
    Of course I have my self to blame by posting stuff in full resolution, but I guess it's the closest thing I have to "artistic pride", I don't want to castrate my work by downsizing it or slapping enormous copyright-labels & watermarks all over the image.
    Don't exploit my work, explore it! 
    • Like 9
  8. The best   M31 I have EVER  seen!!!!!!!!  Stunningly impressive piece of work.


    Thanks for your compliments John, I'm very happy you enjoyed my work :)

    This is just fantastic! I can't believe the amount of detail you have achieved in this. Simpley amazing. This was a HUGE undertaking that clearly shows the amount of time that you put into it. My jaw dropped when I saw the first 100% crops.

    Btw why did you choose to do 180sec Lum over a longer exposure...or is that suppose to be 1800sec?

    Thanks!! It feels like I've been on a month-long expedition to Andromeda, exploring clusters & dustclouds through a panoramic window, (which is partly the truth as well) and I'm very happy I'm able to share this experience with the rest of you!

    Regarding the 3minute subs (180s), That was my maximum exposure-length with the lum filter without overexposing the core of the galaxy, the fast focal-ratio of f/3.8 really speed things up, and since the background sky overpowered the readnoise-level I doubt anything would be gained by going for longer subs. And with my crappy seeing and lots of moving clouds, less data got wasted with the short subs and the stars less bloated and less burned out cores.

    • Like 3
  9. I'm sorry but I just couldn't let something like this slide

    I've lost count but I estimate there are at least 100 galaxies clearly visible in this picture - some as faint as Mag 16 at least.

    I'm afraid your calculations do not give an honest impression of your image. In fact, it's not even close.

    You sir, have captured close to 500 galaxies in your image. The faintest I could find was around Mag 18.2. Shame on you   ;)

    Thanks for showing the rest of us what can be achieved with 5 minute DSLR-subs, awesome!

    (platesolve & annotation done in PixInsight, using M/NGC/IC, PGC & SDSS)

    Best Regards



  10. What's up guys, long time since posting due to über-project and horrible weather!
    Here's a new image I took recently, just to have something to post while I keep collecting more data for a project I'm growing more & more skeptic of being able to bag all the data I need before it's too late for this season.
    It's the small M 108 in Ursa Majoris, a tiny lil' galaxy measuring around 2x8 arcminutes, so it's a great way to see if it's worth chasing those really small targets, and I'd say it is!
    But as many of these small galaxies are portrayed with tight & cramped field of views, I think it looks awesome with much space around it, giving all those small background galaxies a change to shine.
    The annotated version made in PixInsight reported a total of over 2400 galaxies visible in this image (!!!)
    Some may be really hard to see since I wanted a natural look in the image, but they're all there, I set the magnitude-limit for annotation at the weakest visible galaxies (20.4) with my 3min lum subs & slight lightpolution. 
    ACP + Scheduler
    Date: 2014-01-04
    Telescope: Orion Optics AG12
    Camera: QSI 583 wsg-8
    Mount: 10Micron GM 2000 HPS
    Guiding: UNGUIDED
    Lum: 48 x 180s / 144 minutes
    Red: 12 x 300s / 60 minutes
    Green : 12 x 300s / 60 minutes
    Blue : 12 x 300s / 60 minutes
    Total time: 324 minutes / 5.4 hours
    I hope you enjoyed both the M 108 and also exploring the area around it
    Best Regards
    Jonas Grinde
    • Like 3
  11. Many thanks, gentlemen!

    Amazing!!!!! How did you get the annotated version of your picture??

    The annotation was added using PixInsight : ImageSolver + AnnotateImage scripts

    I really think it adds another dimension to the image, so many faint galaxies in the background gets in the spotlight instead of being discarded as faint uninteresting stars

  12. Many thanks, all!

    Additional info, pixel-scale: 0.98" / pixel

    New version up with less blue in the background! Note to self: remember to measure the color-levels with the computer instead of my eyes, especially when processing for hours in a streak

    thats a super image. i feel DBE in PI could do a better a job on the background getting it more neutral looks a tad blue to me.  great job on the processing though

    Thanks for the heads up on the blue background, I've been sitting way too long with the image to see that it actually was blue:P

    I tried DBE but due to my inexperienced handling it wrecked havoc with the rest of the background, killing the faint red nebulosity and introduced some gradients...

    Instead I just added a curve-adjustment in PS, moving the "blue low-clipping spot" inwards, decreasing the blueish tone.

    Was it enough, or was I too careful?

    Best Regards

    Jonas Grinde

  13. Time for a target I've wanted to image for a long time, but totally forgot during last seasons window of opportunity: NGC 7129 & NGC 7142 (+ some PGC galaxies and faint red nebulosity)
    Thanks to the fov the AG12 gives me, I managed to squeeze in both the nebula and open cluster in one shot, which made a very nice couple! The stars that illuminates the nebulosity around NGC 7129 is supposed to contain over a hundred stars aging less than a million years, and in this business that's pretty darned young! I went for 1 hour data in each color-channel, that certainly helped to pull out some of the red background-nebulosity between the two objects, something I didn't know about before processing... At first I thought it was my flats that had gone old, but after several "start-overs" I finally realized it was actual data and not bad processing that caused the diffuse red streak in the background, also visible in other shots I found online afterwards. A nice bonus!
    This might be the last photo you see from me for a while, I'm heading over to the States for a few weeks in december, + I've started a photo-project for which I'll probably need around 40hrs of data :p What happened to the days when I was super-stoked of having as much as 60 minutes of data on just one target?
    ACP + Scheduler
    Date: 2013-11-10
    Telescope: Orion Optics AG12
    Camera: QSI 583 wsg-8
    Mount: 10Micron GM 2000 HPS
    Guiding: Unguided
    Lum: 157 x 180 / 471 minutes
    Red: 19 x 180 / 57 minutes
    Green : 20 x 180s / 60 minutes
    Blue : 19 x 180s / 57 minutes
    Total time: 645 minutes / 10.8 hours
    Best Regards
    Jonas Grinde
    • Like 4
  14. Thanks a lot for the kind and encouraging comments ppl! :)

    The annotated version looks very professionally done, extremely useful though I prefer the naked image - is this information derived from astrometry.net as a plate solve on the final image?

    Both platesolving and annotation-info was made using PixInsight : ImageSolver and AnnotateImage scripts

    • Like 1
  15. Ahoy mateys!

    I finally had the time to process some of the data I've acquired during this autumn, my current workload have "forced" me keep shooting completely automated data from my roll-off-roof observatory 12km outside my city.

    This have been by far one of the toughest targets to process, even though I had quite a pile of data to juggle with, there's endless of stuff embedded in the spiral-arms that took great concentration and discipline to bring out without throwing off the rest of the image. Data aquired during 5 different nights, shooting the subs when the target was in the highest position of the sky.

    I've also included an annotated version where tons of dss2-galaxies are marked and labeled with magnitude. Moonlight during the lum-acquisition limited the background-depth somewhat.

    ACP + Scheduler
    Telescope: Orion Optics AG12
    Camera: QSI 583 wsg-8
    Mount: 10Micron GM 2000 HPS
    Guiding: Unguided
    Lum : 77 x 180s
    Red : 20 x 180s
    Green : 20 x 180s
    Blue : 20 x 180s
    Ha : 12 x 600s
    Total time: 531 minutes / 8.9 hours

    I've just implemented a smooth transition "mouse-over" function for annotated images on my homepage, it's very interesting to spot the weak background-galaxies without having to alt-tab between the two versions...
    Best Regards
    Jonas Grinde
    • Like 15
  16. That is quite literally spectacular! Unguided too....excellent! How on earth have you managed to resolve this so well - it's almost like a near earth object!

    More please ;)

    Thanks mate!

    I'm surprised myself by all the faint stuff showing, even though I havent got 'that' much data, & the subs weren't that long either. I'd say there's no substitute for good tracking, that's where the resolution comes from. Seeing in the range of 3"-3.5", nothing spectacular there.

    And yes, more is on the way :-)

    • Like 1
  17. How's going people?

    Long time since last post due to bright Swedish summer nights, gear-tuning and automation fiddling, but now I'm up & running again.

    I'm starting off the dark season with one of my favorite targets inside the cygnus loop, NGC 6992, east veil nebula.

    The subs where acquired during three moonlit nights, all subs unguided.

    (shooting other targets too, so subs are shot when the target is in the highest position in the sky, thanks to ACP automation)

    I've only used two filters for this image, Ha & O3 (both 5nm). I mixed the color close to Ha/O3/O3 as R/G/B , with slight different weights in G & B, to reach a more blue tone rather than cyan. Both Ha & O3 was used as luminance-data.

    I also created a "natural" star-color mix of the layers, with Ha / Ha+O3 / O3 as R/G/B and adjusted filterweights until I had a natural mix of yellow & blue (go Sweden!) stars, which was later applied as color-data with a star-mask on top of the image.

    The Subs (unguided):

    Ha : 19 x 600s / 190 minutes

    O3 : 12 x 600s / 120 minutes

    Total time: 310 minutes / 5.2 hours

    The Scope:
    Orion Optics AG12
    Aperture: 12"
    Focal lenght: 1140mm
    Focal ratio: f/3.8
    Imaging scale: 0.98" / pixel together with my QSI 583

    The Mount:
    10 Micron GM 2000 HPS
    All subs unguided

    The Camera:
    QSI 583 wsg (with 8-position filterwheel upgrade)
    Filters: Astrodon

    Click image for full resolution:


    It's been so much fun to see this object in the high resolution my setup produces, so many faint formations of nebulosity I've never seen before.

    I also recommend to have a peek at the following link, it's crazy how different the same object can look, imaged through different wavelengths:

    Click here to see the difference between the Ha & O3 at my homepage, with a "mouse-over" function that switches between the two

    Thanks a lot for watching

    Best Regards

    Jonas Grinde


    • Like 9
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